Flora of the Palousc Region 115 



rounded at base, somewhat undulate, denticulate, pubescent, especially be- 

 neath, 5-15 cm. long; petioles 1-2 cm. long, downy: umbels stout-peduncled, 

 8-1 5-flowered: flowers 3-5 mm. long: sepals 5; petals minute, hood-shaped: 

 fruit black, obovoid, as large as a pea, 3-seeded, insipid. Union Flat, very 

 rare. 



186. CEANOTHUS. 



Shrubs or small trees, sometimes spinesceut: leaves alternate, 

 petioled: flowers perfect, in small umbel-like clusters, forming 

 dense panicles or corymbs at the summits of naked branches: calyx 

 5-lobed; calyx and disk adherent to the ovary: petals hooded, 

 spreading: stamens 5: ovary 3-lobed: fruit a 3-lobed drupe, dry 

 and splitting into its 3 carpels when ripe. 



Leaves thick, shiny and gummy. C. velutixus. 



Leaves thin, neither shiny nor gummy. C. SANGUINEUS. 



C. velutinus Dougl. Stout shrub, 1-2 m. high, much branched: branch- 

 lets puberulent: leaves oval, obtuse, subcordate at base, prominently 3-nerv- 

 ed, finely denticulate, thick and firm, glabrous and gummy above, puberu- 

 lent beneath, 5-8 cm. long: petioles stout: flowers white, in terminal pani- 

 cles 5-10 cm. long: peduncles stout, puberulent: pedicels slender: carpels 

 subglobose, 3-lobed above, nearly smooth. Thatuna Hills, common. 



C. sanguineus Pursh. Shrub, 1-3 m. high, with slender smooth usually 

 reddish branchlets: leaves thin, elliptical or ovate, obtuse, rounded at base, 

 finely serrate, glabrate above, paler and puberulent beneath, 5-8 cm. long; 

 petioles slender: panicles lateral, 6-10 cm. long, their peduncles villous: 

 flowers white: capsules smooth, 3-lobed. Thatuna Hills, common. 



Family 47. MALVACEAE. 



Herbs or shrubs: leaves alternate, palmately- veined, with 

 stipules: flowers regular, showy; peduncles axillary, jointed: calyx 

 valvate; sepals 5, united at base, often subtended by an involucre 

 of numerous bractlets: corolla convolute; petals 5, their bases 

 united with each other and with the stamen-column: stamens 

 numerous, monadelphons in a column: pistils several, the ovaries 

 united in a ring or forming a several-celled pod: endosperm scant. 



Carpels i-ovuled. 



Bractlets 3, distinct. 187. mai.va. 



Bractlets none. 188. sidaixea. 



Carpels 2-ovuled. 189. sphaer.ai.cka. 



187. MALVA. 



Pubescent or glabrous herbs: leaves dentate, lobed or dissected: 

 flowers perfect, axillary or terminal, solitary or clustered: invol- 

 ucre 3-leaved: calyx 5-cleft: petals 5, obcordate: styles numerous, 

 stigmatic down the inner side: fruit depressed, separating at ma- 

 turity into as many r -seeded indehiscent carpels as there are styles. 



